title: Molecular doping enhances photoconductivity in polymer bulk heterojunction solar cells.
abstract: Addition of low concentrations (<1:100, dopant:donor) of a fluorinated p-type dopant, F4-TCNQ leads to a considerable enhancement of the photocurrent in PCDTBT:PC70 BM bulk heterojunction solar cells. As a result, the power conversion efficiency increases from 6.41% to 7.94 %.
authors.affiliation: Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA 93106, California, USA.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Huiqiong
authors.initials: H
authors.lastname: Zhou
authors.forename: Jason
authors.initials: J
authors.lastname: Seifter
authors.forename: Lei
authors.initials: L
authors.lastname: Ying
authors.forename: Alexander
authors.initials: A
authors.lastname: Mikhailovsky
authors.forename: Alan J
authors.initials: AJ
authors.lastname: Heeger
authors.forename: Guillermo C
authors.initials: GC
authors.lastname: Bazan
authors.forename: Thuc-Quyen
authors.initials: TQ
authors.lastname: Nguyen
mesh_terms: D058266:Dielectric Spectroscopy; D004566:Electrodes; D037741:Fullerenes / Q000737:chemistry; D009570:Nitriles / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry; D012993:Solar Energy; D013876:Thiophenes / Q000737:chemistry; D017971:Tin Compounds / Q000737:chemistry
chemical_list: D037741:Fullerenes; D009570:Nitriles; D011108:Polymers; D011137:Polystyrenes; D013876:Thiophenes; D017971:Tin Compounds; C533756:poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate); C013703:tetracyanoquinodimethane; C109984:indium tin oxide
keywords: F4-TCNQ; charge carrier density; charge recombination; molecular doping; photocurrent